Lock



FIG. 1 is a perspective view of the lock embodying the new design;

FIG. 2 is a front view of the embodiment in FIG. 1;

FIG. 3 is a top view of the embodiment in FIG. 1;

FIG. 4 is a bottom view of the embodiment in FIG. 1;

FIG. 5 is a left side view of the embodiment in FIG. 1; and,

FIG. 6 is a right side view of the embodiment in FIG. 1.

CLAIM The ornamental design for a lock, as shown and described.